问题
I have created a pdf template with 'open office writer' and filled the fields with iText. In pseudo code like this:
PdfReader reader = new PdfReader("C:/temp/Template.pdf");
FileOutputStream fileOutputStream = new FileOutputStream("C:/temp/TemplateTest.pdf");
PdfStamper stamper = new PdfStamper(reader, fileOutputStream);
stamper.setFormFlattening(true);
stamper.getAcroFields().setField("description", "This is a important description.");
stamper.close();
Now I just want the word 'important' in the 'description' text bold. How can I handle this? Is it possible to change a given format in a pdf template with iText and for substrings as well?
回答1:
You've defined a Text Field in PDF along with a font that should be used for that text field, e.g. Helvetica. In this case, you can only use that font. You can't introduce another font, such as Helvetica-Bold.
What you're looking for is not a Text Field, but a Rich Text Field. In this case, you set a Rich Text value. This Rich Text value looks very much like HTML, but it's slightly different. You can consult ISO-32000-1 to find out what's different about it.
You can fill out a Rich Text Field with iText, but... only if you don't flatten the form. because if you want iText to render the special-flavored HTML, you need code to parse that HTML. Actually: that's what we do in XFA Worker, but that doesn't help you because you don't have an XFA form, you have an AcroForm.
Long story short: read chapter 8 of my book, and you'll find an example where I fill out fields using ColumnText and the field positions. If you don't have the book, take a look at the MovieAds example.
来源：https://stackoverflow.com/questions/16079523/how-to-format-text-in-pdf-template-with-itext